There are many packages that require || ( net-analyzer/netcat6 net-analyzer/netcat net-analyzer/gnu-netcat ) Sometimes, users hit random problems like in our bug https://code.google.com/p/pentoo/issues/detail?id=179 I suggest to fix app-forensics/air with the workaround or create a virtual ebuild
I think this is mostly up to netmon since we own all of the netcat variants (btw initial list missed the fact that nmap provides one too). Personally I vote no on the virtual since all of them seem to behave just a little bit differently flag wise.
[master 3d33c18a40e] app-forensics/air: Allow more netcat alternatives (#483438) 1 file changed, 51 insertions(+) create mode 100644 app-forensics/air/air-2.0.0-r2.ebuild